Retard device for bourdon gauges



Jan. 12 1926.

.O. W. HEISE RETARD DEVICE FOR BOURDON GAUGES Filed August 27, 1921 of'llillfffflfd l INVENTOR Patented Jan. 12, 1926.

UNITED STATES OTTO w. HEISE, or BRIDGEPQRT," o nom'iceaassmnon To ma s, MAXWELIZ' & IvIOGRE, INCORPORATED, or NEW'YORK, It. Y;, A CORPORATION or new JERSEY.

. 1,569,749 TEN-T oFFi-ceg RETARD DEVICE Fort BoUIin'on GAUGES;

Application filed August'27 ,-1921 Serial No. 49%,088.

To all whom it away oonccrm. w Be. it known that I,-@TTO.W. Hmse, acitizen of the United States, residing at Bridgeport, county of Fairfield', State" ofiGon'nectiout, have made a certain new and useful Invention in Retard Devices for Bourdon Gauges, of which the following is a specification.

This invention relates to retard devices for Bourdontube gauges.

The object of the invention isto provide aretard structure for a Bourdon tube which is simple, economical to manufacture, quickly and easily adjustable, and eflicient in operation. y v

A further object of the invention isto provide a retard device'in which retarding action is imposed upon the segment or connections intermediate the tube and the staff of the dial hand instead of being imposed directly upon the tube, thereby eliminating any spasmodic or erratic action of the pointer or dial hand due to the'a'ction of the tube when coming directly in contact with the retarding device.

The invention consists substantially in the construction, combination, location and relative arrangement of parts, all as will .be more fully hereinafter set forth as shown in the accompanying drawing, and finally pointed out in the appended claims.

Referring to the accompanying drawing,

Fig. 1 is a view in front face elevation. parts broken off, showing a Bourdon tube retard structure embodying my invention;

Fig. 2 is a view in section on the line 22, Fig, 1, looking in the direction of the arrows; y I

Fig. 3 is a fragmentary detail illustrating one form of retard spring embodying the principles of my invention; and

Fig. 4c is a broken detail view in section illustrating a modified form of retard spring embodying the invention.

It is one of the purposes of this invention so to position the retarding device that its eti'ect is imposed upon the connections between the tube and the pointer. Inpractice it has been found convenient to arrange. the retarding spring in the path of the segment which is geared to the staff of the pointer or dial hand.

In the accompanying drawing 5 designatesthe Bourdon tube, 6 the socket piece'to spindle or staff for. the dial hand orindeX which is ournalle'd in the frame-8 supported by the socket 6, The-,usualhair spring 9 is connected to thestaff 7. A rocking seg- 'Bourdon tube 5; A stud l5'is'journalled to turn in an opening-in theframe 8,'the axis ofthestud being substantially parallel to the axis about which the segmentturns.

This stud fits-tightly in the opening so that it will remain indefinitely in any position which oneendof theatube is connected, 7I'the 1 of; angular adjustment 'to which it may be turned. Preferably the st ud is provided at one end with a slotted head 16- permitting the application ofa' screw driver for turning 1t.. A coiled spr-1ng13 is secured tothe other end of the stud, the axis of the coil being eccentric. to that of the stud, so that when the stud is turned the spring is shifted bodily in adirection-transverseof its axis. The stud with the spring is so disposed that thefree end-of the spring extendstransversely across the path of-the segment 10 so that after a predetermined movement of I I the latter it encounters the spring and is re"- siliently retarded thereby, I

In the modification shownin Fig. 4 a substantially-stra-ight elongate wire spring 14 A is employed. This spring is also 'mounted eccentric to the axis of the stud and extends across thepath ofthe segment.

Itwill be seen. that the spring retarding device maybe very easily adjusted so as to beset at the req'uired retarding point bv turning the-stud 15', It is obvious that the retarding device whether, in the form of a coil or in the form of an} elongate flexible wire, or spring, may be adjusted by slightly bending the same more or less away from or towards the axis of the segment and in the direction of the length of the side of the segment, as indicated in dotted lines at 17, in Fig. A, in order to vary the point at which it is engaged by the edge of the segment.

In practice a coiled spring is advanta geous for use in high pressure retard gauges, for the reason that it is less liable to become permanently set by imposing the force of an abnormally applied pressure thereon, and furthermore, a larger size or diameter of Cit Wire may be employed, which renders the device more sturdy and rugged.

The adjustment for various amounts of travel for an identical initial pressure exerted by the Bourdon tube, or for an identical travel for variations of the initial pressure exerted by the tube, may thus be made either by bending the retard spring away from or towards the axis of the segment.

It will be observed that the strain of the impact is taken by the bearings of the segment, and that variations, it any, im-

posed upon the path of travel of the free end of the Bourdon tube by reason of the resistance of the retarding spring, have no etleet in causing spasmodic, erratic or ineflieient movements of the dial hand or pointer.

Having now set forth the objects and nature of my invention, and a construction embodying the principles thereof, What I claim as new and useful and of my own invention and desire to secure by Letters Patent is a i 1. Apressure gauge having a pressure response element, a movable index, connections for transmitting movement from the pressure responsive element to the index comprising a movablepart, a bodily adjust-,

across the )ath of movement of the se l e ment, and a normally fixed but rotatable support to Which one end oi": the spring is fixedly secured and by means of Which the spring may be bodily shifted, said support being provided with a slot for the reception of a screw driver for turning it.

3. A pressure gauge having a Bourdon tube, a movable index, connections eompris ing a rocking segment for transmitting movement from the tube to the index, .an elongate spring extending transversely across the path of the segment, and a normally stationary rotatably adjustable stud having its axis substantially parallel to that of the sector, one end of the spring being supported upon the stud eccentrically to the latter. i

4:. A. pressure gauge comprising a Bourdon tube, a rocking segment oonnected'thereto, an index actuated by the segment, a stud arranged to turn about an axis substantially parallel to that of the segment, said stud normally being fixed inposition, and a helical spring having one end secured in eccentric position to one end of the stud, said spring extending transversely across the path of the segment and being unsupported at its opposite end. i

5. A pressure gauge having a pressure responsive element, an index actuable thereby, and means operative upon the attainment of a predetermined pressure for retarding the pressure responsive element comprisinga part movable by the pressure responsive element, a bodily adjustable elongate spring extending transversely across the path of movement of said movable part, andmeans constraining the spring during adjustment to move bodily in a fixed and predetermined path transverse of its longitudinal axis, said means comprising a movable support upon which the spring is mounted, and a fixed member having a hearing for the reception of the support.

6. A pressure gauge having a pressure responsive element, an index actuable thereby, and means operative upon the attainment of a predetermined pressure for retarding the pressure responsive element comprising a part movable by the pressure responsive element, a support turning in a fixed bearing, and an elongate member mounted eccentrically upon the support and turning therewith, said member extending transversely across the path of: the said movable part.

In testimony whereof I have hereunto set my hand on this 19th day of August A. 1)., 1921.

OTTO VV.. HEISE. 

